[Users] BenchIO_HDF5 questions

Avi Purkayastha avi at sicortex.com
Fri Apr 18 08:12:16 CDT 2008


Hello,
I have been testing the BenchIO_HDF5 benchmark and a number of issues  
came up:

1) I was testing on a 10 GB filesystem and seem to run out of space  
on runs with varying proc counts. The benchmark page lists that each  
proc contributes 352 MB to the overall data checkpoint, so does that  
mean that the total required disk space is N*352 MB, where N is the  
number of procs?

2) Is there an order of preference based on importance, for these  
three tests -- onefile, eachproc, and 8proc from the Cactus user  
community, or all of equal importance?

3) Is there any data from these I/O tests listed anywhere from  
different architecture systems with fast disks and/or filesystems, so  
one can get a sense of what is considered good, bad or ugly IO rates?

Thanks
	-- Avi

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